N-acyl and n-organosulfonyl mono-or di-substituted sulfamoylbenzenesulfonamides

ABSTRACT

N-ACRYL AND N-ORGANOSULFONYL MONO-SUBSTITUTED OR DISUBSTITUTED SULFONYLBENZENESULFONAMIDES AND SALTS THEREOF WHEREIN THE BENZENE RING MAY BE SUBSTITUTED BY HALO, ALKYL, TRIHALO LOWER ALKYL, NITRO, CYANO, CARBOXY OR A HYDROCARBYLENE MOIETY. THE PRODUCTS ARE PREAPRED BY EITHER OF TWO ROUTES: (1) BY TREATING A MONO- OR DI-SUBSTITUTED SULFAMOYLBENZENESULFONAMIDE WITH ACYL HALIDE (OR ORGANOSULFONIC ACID ANHYDRIDE) OR WITH A CARBOXYLIC ACID ANHYDRIDE (OR ORGANOSULFONIC ACID HALIDE), OR (2) BY TREATING A MONO- OR DI-SUBSTITUTED SULFAMOYLVENZENESOLFONYL HALIDE WITH A SALT OF A ACRYL (OR ORGANOSULFONYL) AMIDE. THE PRODUCTS ARE USEFUL IN THE TREATMENT OF GOUT AND GOUTY ARTHRITIS.

United States Patent NoDrawing. Filed Sept. 26, 1969, Ser. No. 870,380 Int. Cl. com /16; C076 193/78 US. Cl. 260-3472 13 Claims ABSTRACT OF THE DISCLOSURE N-acyl and N-organosulfonyl mono-substituted or disubstituted sulfamoylbenzenesulfonamides and salts thereof wherein the benzene ring may be substituted by halo, alkyl, trihalo lower alkyl, nitro, cyano, carboxy or a hydrocarbylene moiety. The products are prepared by either of two routes: (1) by treating a monoor di-substituted sulfamoylbenzenesulfonamide with an acyl halide (or organosulfonyl halide) or with a carboxylic acid anhydride (or organosulfonic acid anhydride), or (2) by treating a monoor di-substituted sulfamoylbenzenesulfonyl halide with a salt of a acyl (or organosulfonyl) amide. The products are useful in the treatment of gout and gouty arthritis.

This invention relates to a new class of chemical compounds which can be described generally as N-acyl and N-organosulfonyl mono-substituted or di-substituted sulfamoylbenzenesulfonamides and salts thereof. It is also an object of this invention to describe novel methods for the preparation of the -N-acyl and N-organosulfonyl mono-substituted or di-substituted sulfamoylbenzenesulfonamides.

Pharmacological studies show that the instant products are eifective uricosuric agents which can be used in the treatment of gout and gouty arthritis by increasing the excretion of uric acid by the kidney. The instant products are also a valuable adjuvant for inhibiting the excretion of penicillin, thus maintaining high antibiotic levels in the treatment of conditions that require intensive penicillin therapy.

The 'N-acyl and N-organosulfonyl mono-substituted and di-substituted sulfamoylbenzenesulfonamides of this invention are compounds having the following structural formula:

wherein R is alkyl, for example, lower alkyl such as methyl, ethyl, n-propyl, isopropyl, n-butyl and the like, cycloalkyl, for example, cycloalkyl containing from 5 to 6 nuclear carbon atoms such as cyclopentyl, cyclohexyl and the like, cycloalkylalkyl, for example, a mononuclear cycloalkyl substituted lower alkyl moiety wherein the cycloalkyl group contains from 5 to 6 nuclear carbon atoms such as cyclopentylmethyl, cyclohexylmethyl and the like, alkenyl, for example, lower alkenyl such as allyl and the like, alkynyl, for example, lower alkynyl such as 2- propynyl and the like, haloalkyl, for example, a monohalo-substituted lower alkyl, such as chloromethyl, 2-chloroethyl and the like, polyhalo-substituted lower alkyl, for example, dihalo lower alkyl such as dichloromethyl 2,2- dichloroethyl and the like and trihalo lower alkyl such as trichloromethyl, 2,2,2-trichloroethyl, 3,3,3-trichloro-npropyl, 3,3-dichloro-l-chloropropyl and the like, aryl for example, mononuclear aryl such as phenyl and the like, aralkyl, for example, mononuclear aralkyl such as benzyl and the like, dialkylsulfamoyl-substituted aryl, for example, di-lower alkylsulfamoyl-substituted mononuclear aryl such as di-n-butylsulfamoylphenyl and the like or a 5- or 6-membered heterocycle bonded either directly via a nuclear carbon or indirectly via a methylene chain (i.e., -CH to the carbonyl or sulfonyl moiety represented by Z and in which the heterocycle contains a single hetero atom selected from oxygen, nitrogen or sulfur, thus, suitable heterocycles include, for example, such moieties as furyl, pyrrolidinyl, pyridyl, for example, 2-pyridyl and the like, 2, 3 or 4-piperidyl, 2-pyridylmethyl, 2, 3 or 4- piperidylmethyl, furfuryl, 2 or 3-thienyl or pyrrolyl such as 2-pyrrolyl and the like; R is hydrogen or alkyl, for example, lower alkyl such as ethyl, n-propyl, n-butyl, pentyl, hexyl and the like, cycloalkyl, for example, a mononuclear cycloalkyl containing from 5 to 6 nuclear carbon atoms, such as cyclopentyl, cyclohexyl and the like; R is alkyl, for example, lower alkyl such as ethyl, n-propyl, n-butyl, pentyl, hexyl and the like, cycloalkyl, for example, a mononuclear cycloalkyl containing from 5 to 6 nuclear carbon atoms, such as cyclopentyl, cyclohexyl and the like, and R and R taken together may be joined with the nitrogen to which they are attached to form a saturated 5- or 6-membered heterocyclic ring such as l-pyrrolidinyl, morpholino, piperidino and the like; X is halo, for example, bromo, chloro, fluoro and the like, lower alkyl such as methyl and the like, nitro, trihalo methyl such as trifluoromethyl and the like, cyano or carboxy and the like or two X radicals on adjacent carbon atoms of the benzene ring may be joined to form a hydrocarbylene chain containing from 3 to 4 carbon atoms between their points of attachment, for example, trimethylene, tetramethylene or 1,3-butadienylene (i.e., -CH=CHCH=CH), Z is carbonyl or sulfonyl and m is an integer having a value of 0-4 and the non-toxic, pharmaceutically acceptable salts thereof as, for example, the alkali metal and alkaline earth metal salts such as are derived from sodium, calcium, magnesium and the like, or salts of secondary amines such as dialkylamines or heterocyclic amines such as dimethylamine, diethylamine, pyrrolidine, piperidine, pyridine or morpholine and the like.

A preferred embodiment of this invention relates to the N-acyl (or N-organosulfonyl) di-substituted sulfamoylbenzenesulfonamides having the following structural formula:

wherein R is lower alkyl or a S-membered heterocycle containing a single oxygen atom such as furyl and the like, R and R are lower alkyl, Z is carbonyl or sulfonyl and X and X are hydrogen, halo, lower alkyl, trihalomethyl or nitro or taken together with the nuclear carbons to which they are attached, the X and X may be joined to form a 1,3-butadienylene chain (i.e.,

and the alkali metal or alkaline earth metal salts thereof. This class of compounds exhibits particularly good uricosuric activity and represents a preferred subgroup of compounds within the scope of this invention.

The N-acyl and N-organosulfonyl mono-substituted and di-substituted sulfamoylbenzenesulfonamides of this invention are conveniently prepared by either of two alternate processes. One such method comprises treating a mono-substituted or a (ii-substituted sulfamoylbenzenesulfonamide with either an acyl halide (or organosulfonyl)halide or with a carboxylic acid anhydride (or organosulfonic) anhydride. A second method comprises treating the appropriate sulfamoyl-substituted benzenesulfonyl halide with a salt of an acyl (or organosulfonyl) amide.

Specifically, the first of the above-mentioned processes comprises the reaction of a mono-substituted or di-substituted sulfamoylbenzenesulfonamide (II, infra) with either a suitable acyl halide or an organosulfonyl halide or with a suitable carboxylic acid anhydride or organosulfonic acid anhydride, preferably, in the presence of a strong inorganic acid such as sulfuric acid and the like. The reaction may be conducted at a temperature of from about 20 C. to about 100 C. and any solvent in which the reactants are reasonably soluble and substantially inart may be employed. Suitable solvents include, for example, hydrocarbons such as benzene, toluene and the like, tertiary amines, for example, trialkylamines and heterocyclic amines such as trimethylamine, pyridine and the like. Also, in addition to the foregoing, an excess of the acyl halide or carboxylic acid anhydride which is employed as the reactant in the process may be used as the diluent; however, when an organosulfonyl halide is employed, it is advisable to add a small amount of a tertiary amine to the reaction mixture. The following equation which describes the use of an acyl halide reactant illustrates this process; however, it is to be understood that by substituting the corresponding known organosulfonyl halides, carboxylic acid anhydrides or organosulionic acid anhydrides for the acyl halide depicted infra, an identical product may be obtained:

(X) m (X) m o ll u R so mt acx a so usca wherein R, R R X and m are as defined above and X is halo such as bromo, chloro, fiuoro and the like. Representative of the acyl halides which may be employed are alkanoyl halides such as a lower alkanoyl halide including acetyl chloride, n-propionyl chloride, n-butyryl chloride and the like, cycloalkylcarbonyl halides containing from 5-6 nuclear carbon atoms such as cyclopentylcarbonyl chloride, cyclohexylcarbonyl chloride and the like, cycloalkyl substituted alkanoyl halides as, for example, a mononuclear cycloalkyl substituted lower alkanoyl halide containing from 5-6 nuclear carbon atoms such as cyclopentylacetyl chloride, cyclohexylacetyl chloride and the like, alkenoic acid halides such as 3-butenoyl chloride and the like, alkynoic acid halides such as 3-butynoic acid chloride and the like, halo-substituted lower alkanoyl halides as, for example, chloroacetyl chloride, 3-chloropropionyl chloride and the like, polyhalo-substituted lower alkanoyl halides, as, for example, dihalo loweralkanoyl halides such as dichloroacetyl chloride, 3,3-dichloropropionyl chloride and the like, trihalo lower alkanoyl halide such as tlichloroacetyl chloride, 3,3,3-trichloropropionyl chloride, 4,4,4-trichlorobutyryl chloride or 4,4-dichloro-2- chlorobutyryl chloride and the like, arylcarbonyl halides, for example, mononuclear arylcarbonyl halides such as benzoyl chloride and the like, aralkylcarbonyl halides, for

example, mononuclear aralkylcarbonyl halides, such as phenylacetyl chloride and the like, a suitable 5- or 6-membered heterocyclic acyl halide such as 2-furoyl chloride, 2- pyrrolidinecarbonyl chloride, 2, 3 or 4-piperidinecarbonyl chloride, Z-pyridineacetyl chloride, 2, 3 or 4-piperidineacetyl chloride, furanacetyl chloride, 2 or 3-thiophenecarbonyl chloride or 2 or S-pyrrolecarbonyl chloride and the like. Representative of the carboxylic acid anhydrides which may be employed are the alkanoic acid anhydrides, for example, the lower alkanoic anhydrides such as acetic anhydride, n-propionic anhydride, n-butyric anhydride and the like; cycloalkylformic acid anhydrides, cycloalkylalkanoic acid anhydrides, for example, mononuclear cycloalkyl-lower alkanoic anhydrides containing from 5 to 6 nuclear carbon atoms such as cyclopentaneacetic anhydride, cyclohexaneacetic anhydride and the like, alkenoic acid anhydrides, for example, lower alkenoic acid anhydrides such as B-butanoic acid acid anhydride and the like, alkynoic acid anhydrides, for example, lower alkynoic acid anhydrides such as 3-butynoic acid anhydride and the like, halo-substituted lower alkanoic acid anhydrides, for example, chloroacetic acid anhydride, 3-chloropr0pionic acid anhydride and the like, polyhalo-substituted lower alkanoic acid anhydrides, for example, dihalo lower alkanoic acid anhydrides such as dichloroacetic anhydride, 3,3-dichloro propionic anhydride and the like, trihalo lower alkanoic acid anhydrides such as trichloroacetic acid anhydride, 3,3,3-trichloropropionic acid anhydride, 4,4,4-trichlorobutyric acid anhydride, 4,4-dichloro-2-chlorobutyric acid anhydride and the like, arylcarboxylic acid anhydrides, for example, mononuclear arylcarboxylic acid anhydrides such as benzoic acid anhydride and the like, aralkanoic acid anhydrides, for example, mononuclear aralkanoic acid anhydrides such as phenylacetic acid anhydride and the like, 5- or 6-membered heterocyclic carboxylic acid anhydrides such as furoyl anhydride, 2-pyrrolidinylcarboxylic acid anhydride, 2,3 or 4-piperidylcarboxylic acid anhydride, 2 pyridylacetic acid anhydride, 2, 3 or 4-piperidylacetic acid anhydride, furylacetic acid anllilydride, 2 or 3-thienylcarbonic acid anhydride and the A second method for preparing the N-acyl monoor disubstituted sulfamoylbenzenesulfonamides and also a method for preparing the N-organosulfonyl mono-substituted or disubstituted sulfamoylbenzenesulfonamides of this invention comprises treating a monoor di-substituted sulfamoylbenzenesulfonyl halide (III, infra) with either a salt of a suitable acyl amide or with a salt of a suitable organosulfonamide. The reaction may be conducted in any solvent in which the reactants are reasonably soluble and which are inert to the reactants. Suitable solvents include, for example, toluene, benzene, diethyl ether and the like. Temperature is not a particularly critical aspect of this reaction but, in general, temperatures in the range of from about 25 C. to C. are most suitable for conducting the synthesis. The following equation wherein the metal salt employed in the salt of an acyl amide illustrates this method of preparation, however, it is to be understood that the salt derivative of an organosulfonamide of the formula: (RSO NH),,M may be substituted therefore in an otherwise similar process to afl'ord an identical product:

III I wherein R, R R X, X and m are as defined above and M is the cation derived from an alkali metal such as sodium and the like, an alkaline earth metal such as magnesium and the like or a Group IIb metal such as mercury and the like and n is an integer having a value of 1 when 5 M is the cation derived from an alkali metal and a value of 2 when M is the cation derived from an alkaline earth or Group IIb metal.

If desired, the N-acyl monoor di-substituted sulfamoylbenzenesulfonamides may be converted to their salts, for

example, their alkali metal, alkaline earth metal, ammonium or dialkylammonium salts by treating the N-acyl monoor disubstituted sulfamoylbenzenesulfonamides with a suitable base as, for example, with an alkali metal (IV, infra) with a suitable amine such as a monoor disubstituted alkylamine, including a monoor di-substituted lower alkylamine, such as monoor diethylamine, monoor di-n-propylamine, monoor di-n-butylamine, monoor di-pentylamtirle, monoor di-hexylamine and the like or a heterocyclic amine such as pyrrolidine, morpholine, piperidine and the like. Any solvent which is substantially inert to the reactants may be employed as, for example, acetone, benzene, pyridine and the like; however, we have found it convenient to use as the solvent an excess of the particular amine employed as the starting material in the process. While the temperature at which the reaction is conducted is not critical, it is most desirable to conduct the process at a temperature of from about C. to 100 alkoxide such as sodium methoxide and the like or with 15 C. The following equation illustrates this process:

an alkali metal or alkaline earth metal hydroxide or carbonate such as sodium hydroxide, calcium hydroxide, sodium carbonate, magnesium carbonate and the like or with an alkali metal hydride such as sodium hydride and the like or with ammonia or a secondary amine, for example,

a dialkylamine or a heterocyclic amine such as dimethyl- 3O prises the reaction of a sulfamoylbenzenesulfonyl halide (IV, infra) with a suitable amine.

The first of the above-mentioned processes, i.e., the treatment of a monoor di-substituted sulfamoylbenzene sulfonyl halide (III, infra) with ammonia is conveniently conducted by adding the monoor di-substituted sulfamo- IV II wherein R R X, X and m are as defined above.

The monoor di-substituted sulfamoylbenzenesulfonyl halides (III) employed as starting materials in the preparation of the monoor di-substituted sulfamoylbenzene-sulfonamides (II) and also used as starting materials in the preparation of the N-acyl (or N-organosulfonyl) monoor disubstituted sulfamoylbenzene-sulfonamides (I, supra) may 'be prepared by diazotization of an appropriate mono- (or d i substituted) .sulfamoylani'line (V, infra). The mono- (or di-substituted)sulfamoylaniline is dissolved in a solution of glacial acetic acid and concentrated hydrochloric acid and is then converted to its corresponding diazonium salt by treatment with an aqueous solution of sodium nitrate. The diazonium salt of the mono- (or di-substituted)sulfamoylaniline (Va, infra) is treated with a glacial acetic acid solution of sulfur dioxide and cuprous halide, such as cuprous chloride, cuprous bromide or cuprous fiuonide and water. The reaction may be conducted at temperatures of from about 0 C. to 25 C., but it is preferable to conduct the process at 0-5 C. The following equation illustrates this process:

on v

III

ylbenzenesulfonyl halide to an excess of ammonia, prefwherein R R X, X and m are as defined above.

erably liquid ammonia. The following equation illustrates the process of this reaction:

wherein R R, X, X and m are as defined above.

The second method for preparing the monoor disubstituted sulfamoylbenzenesulfonamides (II, infra) com- The sulfamoylbenzenesulfonyl halides (IV) which are employed as starting materials in the preparation of the mono-. (or di-substituted)sulfamoylbenzenesulfonamides (II) are prepared by following substantially the diazotization procedure described above for the preparation of the prises the reaction of a sulfamoylbenzenesulfonyl halide monoor di-substituted sulfamoylbenzenesulfonyl halides (III, supra). The following equation illustrates this process:

m m @50 NH; U5.azotzizalzicm SO NH NH: X N

S /CuX I V SOZNHZ x so wherein X, X and m are as defined above.

The mono- (or (ii-substituted)sulfamoylanilines (V) employed as intermediates in the preparation of the monoor di-substituted sulfamoylbenzenesulfonyl halides (III) are prepared by any one of three alternate processes. One such method comprises the hydrolysis of an N- lower alkanoyl mono- (or di-substituted)sulfamoyl aniline; a second method comprises the reduction of the corresponding sulfamoyl-substituted nitrobenzene, and a third method comprises treating a (monoor di-substituted sulfamoyl)halobenzene with ammonia in an autoclave.

The first of the above-mentioned processes, i.e., the hydrolysis process, comprises hydrolyzing an appropriate N-lower alkanoyl monoor di-substituted sulfamoylaniline (VII, infra) preferably with an aqueous solution of an inorganic acid such as hydrochloric acid and the like or, alternatively, with an aqueous solution of a base as, for example, an alkali metal hydroxide such as sodium hydroxide, potassium hydroxide and the like. The follow ing equation illustrates this process:

co o (Xl It a @uucn Hydrolysis; R1\ us, so R2 z Ra N50 wherein R R X and m are as defined above and R is lower alkyl such as methyl, ethyl, n-propyl and the like.

The second method by which the mono- (or di-substituted)sulfamoylanilines (V, infra) may be prepared comprises the reduction of the corresponding monoor disubstituted sulfamoylnitrobenzene (VIII, infra) either chemically as, for example, with iron powder and the like in an aqueous solution of a lower alkanoic acid such as acetic acid or by catalytic hydrogenation with ruthenium, rhodium or Raney alloy in sodium hydroxide. While the temperature at which the reaction is conducted is not critical, it is most convenient to elfect the synthesis at a temperature in the range of from about 25 C. to 100 C. The following equation illustrates this process:

wherein R R X and m are as defined above.

The third method of preparation and one which is most suitable for preparing the monoor (di-substituted) sulfamoyl anilines wherein the X substituent is nitro or sulfamoyl comprises treating a monoor di-substituted sulfamoylhalobenzene (IX, infra) with an alcoholic solution of ammonia in an autoclave at temperatures of from about C. to C. The following equation illustrates this process:

4 (X in h Nso X NH /autoclave R @NH 2 5 uso IX R Va wherein R R and m are as defined above, X is halo such as chloro and the like and X is nitro or sulfamoyl.

The N-lower alkanoyl (monoor di-su'bstituted sulfamoyl)anilines, monoor di-substituted sulfarnoyl nitrobenzenes and monoor di-substituted sulfamoylhalobenzenes employed as intermediates in the preparation of the (monoor (ii-substituted sulfamoyDaniline derivatives (V) are conveniently prepared by treating, respectively, a lower alkanamido substituted benzenesulfonyl halide, a nitrobenzenesulfonyl halide or a halobenzenesulfonyl halide with a suitable amine as, for example, an alkyl amine, including monoand di-lower-alkylamines such as monoand diethylarnine, monoand dipropylamine, monoand dibutylamine, monoand dipentylamine, monoand dihexylamine and the like. Any solvent which is inert to the reactants may be employed. Suitable solvents include, for example, acetone, benzene, pyridine and the like or, alternatively, an excess of the amine which is employed as the reactant in the process may be used as the solvent. The temperature at which the reaction is conducted is not critical, however, we have found it convenient to conduct the reaction at ambient temperature. The following equation illustrates this process:

wherein R R X, X and m are as defined above and Y is lower alkanamido such as acetamido, propionamido and the like or nitro or halo.

The lower alkanamido substituted benzenesulfonyl halides employed as reactants in the foregoing process are either known compounds or may be prepared by treating the corresponding anilide (XI I, infra) with a halosulfonic acid such as chlorosulfonie acid, fluorosulfonic acid and the like. This reaction is conducted by adding the anilide to the halosulfonic acid at room temperature and when the addition is complete, warming the reaction mixture to complete the reaction. The following equation illustrates this process:

XII

wherein R X, X and m are as defined above.

Included within the scope of this invention are the non-toxic, prharmaceutically accpetable salts of the instant products. In general, any base which will form a salt with the foregoing N-aoyl (or N-organsoulfonyl) monoor di-substituted sulfamoylbenzenesulfonamides and whose pharmacological properties will not cause an adverse physiological effect when ingested by the body system is considered as being within the scope of this invention. Suitable bases for preparing the salts include, for example, the alkali metal and alkaline earth metal hydroxdes, carbonates and alkoxides, ammonia, secondary amines, for example, a dialkylamine or a heterocyolic amine such as dimethylamine, diethylamine or pyridine and the like.

The examples which follow illustrate the N-acyl (or N-organosulfonyl) monoor di-substituted sultamoylbenzenesulfonamides (I) of this invention and the methods by which they are prepared. However, the examples are illustrative only and it will be apparent to those having ordinary skill in the art that all of the products embraced by Formula I, supra, may also be prepared in an analogous manner by substituting the appropriate starting materials for those set forth in the examples.

EXAMPLE 1 N-acetyl-4-di-n-butylsulfamoyl-3-chlorobenzene sulfonamide Step A: N,N'-di-n-butyl-2-chlorosulfanilamide 2-chloro-N-acetylsulfanilyl chloride (18 g.) is added carefully to a mixture of di-n-butylamine (26 g.) in acetone (100 ml.). The reaction is warmed for /2 hour and then the solvent removed to yield N -acetyl-N ,N -di-nbutyl-2-chlorosulfanilamide to which is added ethanol (25 ml.) and hydrochloric acid (25 ml.). The resulting solution is heated under reflux for 1% hours. About V2 of the solvent is removed and then the reaction mixture is cooled and made basic with sodium hydroxide solution to precipitate the crude product which is removed by filtration and recrystallized from a mixture of ether and petroleum ether to afford 15.8 g. of N ,N -di-n-butyl-2- chlorosulfanilamide, M.P. 107-109 C.

Elemental analysis for C H ClN O S.-Calcd. (percent): C, 52.73; H, 7.27; N, 8.79. Found (percent): C, 52.80; H, 6.95; N, 8.70.

Step B: 3-ehloro-4-din-butylsulfamoylbenzenesulfonyl chloride A solution of N ,N -di-n-butyl-2-chlorosulfanilamide (11 g.) in glacial acetic acid (50 ml.) and concentrated hydrochloric acid (25 5ml.) at C. is converted to the diazonium salt by treatment with a solution of sodium nitrite (2.5 g.) in Water ml.). A solution of sulfur dioxide (25 g.) in glacial acetic acid (50 ml.) is prepared to which is added a solution of cupric chloride (2 g.) in Water (5 ml.). When the above reactions have been completed, the diazonium salt is added carefully to the sulfur dioxide solution. After 2 hours, ice water is added to precipitate the 3-chloro-4-di-n-butylsulfamoylbenzenesulfonyl chloride. The crude product is dissolved in ether and precipitated with petroleum ether to yield 11.6 g. of 3-chloro 4 di-n-butylsulfamoylbenzenesulfonyl chloride, M.P. 62"64" C.

Step C: 3-cl1loro-4-dl-n-buty1sulfamoylbenzenesulfon'amide The 3-chloro 4 di-n-butylsulfamoylbenzenesulfonyl chloride (15 g.) is added to an excess of liquid ammonia. When the excess ammonia has evaporated, the solid residue is triturated with dilute hydrochloric acid and then recrystallized from benzene and hexane to afford 13.6 g. of 3-chloro 4 di-n-butylsulfamoylbenzenesulfonamide, M.P. 9294 C.

Elemental analysis for C H C1N O S .Calcd. (percent): C, 43,91; H, 6.05; N, 7.32. Found (percent): C, 44.21; I-I, 5.92; N, 7.28.

Step D: N-acetyl-4-dl-nbutylsulfamoyl-'3chlorobenzenesulfonamlde A suspension of 2. 6 g. of sodium hydride (5 g. of a 51.6% supension in mineral oil) in dry benzene (300 ml.) is stirred while adding 3-chloro-4-di-n-butylsulfamoylbenzenesulfonamide (38.3 g.). The mixture is heated /2 hour on the steam bath. The resulting gelatinous suspension is cooled and then acetyl chloride (10 g.) is added slowly dropwise as frothing allows. The reaction is heated under reflux for 1 hour after which the benzene is removed by distillation. The tacky residue is stirred with a mixture of ether and sodium bicarbonate solution. The aqueous phase is separated and carefully acidified to precipitate the crude product. Recrystallization from ether (300 ml.) and petroleum ether (150 ml.) affords 29.6 g. of N-acetyl-4-di-n-butylsulfamoyl-3-chlorobenzenesulfonamide, M.P. 119-120 C.

10 Elemental analysis for C H ClN O S .Calcd. (percent): C, 45.21; H, 5.93; N, 6.59. Found (percent): C, 45.45; H, 5.85; N, 6.59.

EXAMPLE 2 N-acetyl-4-diethylsulfamoylbenzenesulfonamide, diethylamine salt By substituting for the 3-chloro-4-di-n-butylsulfamoylbenzenesulfonamide of Example 1, Step. D, an equimolar quantity of 4-diethylsulfamoylbenzenesulfonamide and by following substantially the procedure described therein, there is obtained N-acetyl-4-diethylsulfamoylbenzenesulfonamide which is isolated as its diethylamine salt, M.P. -132.5 C.

Elemental analysis for C H N O S .Calcd. (percent): C, 47.15; H, 7.17; N, 10.31. Found (percent): C, 46.86; H, 7.23; N, 10.28.

EXAMPLE 3 N-cyclopentylacetyl-4-di-n-butylsulfamoyl-3-chlorobenzenesulfonamide, diethylamine salt By substituting for the acetyl chloride of Example 1, Step D, an equimolar quantity of cyclopentylacetyl chloride and by following substantially the procedure described therein, there is obtained N-cyclopentylacetyl-4- di-n-butylsulfamoyl-3-chlorobenzenesulfonamide, which is isolated as its diethylamine salt, M.P. 103 105 C.

Elemental analysis for C H ClN O S .-Calcd. (percent): C, 53.05; H, 7.83; N, 7.42. Found (percent): C, 52.81; H, 7.47; N, 7.43.

EXAMPLE 4 N-chloroacetyl-4-di-n-butylsulfamoyl-3-chlor0benzenesulfonamide, diethylamine salt By substituting for the acetyl chloride of Example 1, Step D, an equimolar quantity of chloro'acetyl chloride and by following substantially the procedure described therein, there is obtained N-chloroacetyl-4-di-n-butylsulfamoyl-3-chlorobenzenesulfonamide, isolated as its diethylamine salt, M.P. 122-124 C.

Elemental analysis for C H ClN O S .Calcd. (percent): C, 41.83; H, 5.27; N, 6.10. Found (percent): C, 42.88; H, 4.92; N, 5.94.

EXAMPLE 5 N-2-furoyl-4-di-n-butylsulfamoyl-3-chlorobenzenesulfon-amide, diethylamine salt By substituting for the acetyl chloride of Example 1, Step D, an equimolar quantity of 2-furoyl chloride and by following substantially the procedure described therein, there is obtained N 2furoyl 4 din-buty1sulfamoyl-3- chlorobenzenesulfonamide, isolated as its diethylamine salt, M.P. 116 C.-118 C.

Elemental analysis for C H ClN O 'S .-Calcd. (percent): C, 50.21; H, 6.60; N, 7.64. Found (percent): C, 50.05; H, 6.19; N, 7.64.

EXAMPLE 6 N-acetyl-4-di-n-butylsulfamoyl-3- bromobenzenesu'lfonamide Step A: N ,N di-nbutyl-2-bromosulfanilamlde described therein, afiords 3-brorno-4-di-n-butylsulfamoylbenzenesulfonylchloride.

Step C: 3-bromo-4-di-n-butylsulfamoylbenzenesulfonamlde By substituting for the 3-chloro-4-di-n-bntylsulfamoylbenzenesulfonyl chloride of Example 1, Step C, an equimolar quantity of 3-bromo-4-di-n-butylsulfamoylbenzenesulfonyl chloride and by following substantially the procedure described therein, there is obtained 3-bromo-4-din-butylsulfamoylbenzenesulfonamide, M.P. 122124 C.

Elemental analysis for C H BrN 'O 'S .-Calcd. (percent): C, 39.34; H, 5.42; N, 6.56. Found (percent): C, 39.76; H, 5.05; N, 6.52.

Step D: Nacetyl-4-di-n-butylsulfonamyl- 3-bromobenzenesulfonamide By substituting for the 3-chloro-4-di-n-butylsulfamoylbenzenesu'lfonamide of Example 1, Step D, an equimolar quantity of 3-bromo-4-di-n-butylsulfamoylbenzenesulfonamide and by following substantially the procedure described therein, there is obtained N-acetyli-di-n-butylsulfamoyl-3-bromobenzenesulfonarnide, M.P. 126 -127 C.

Elemental analysis for C H BrN O S- .Calcd. (percent): C, 40.94; H, 5.37; N, 5.97. Found (percent): C, 40.90; H, 5.15; N, 5.97.

EXAMPLE 7 N-acetyl-4-di-n-propylsulfamoyl-3- chlorobenzenesulfonamide Step A: N ,N -di-n-propyl-2-chlorosulfanilamlde By substituting for the di-n-butylamine of Example 1, Step A, an equimolar quantity of di-n-propylamine and by following substantially the procedure described therein, there is obtained N ,N -di-n-propyl-2-chlorosulfanilamide.

Step B: 3-chloro-4-di-n-propylsulfamoylbenzenesulfonamide By substituting for the N ,N -di-n-butyl-2-chlorosulfanilamide of Example 1, Step B, an equirnolar quantity of N ,N -di-n-propyl-2-chlorosulfanilarnide and by following substantially the procedure described therein, there is obtained 3 chloro-4-di-n-propylsulfamoylbenzenesu'lfonamide.

Step C: 3-ehloro-4-di-n-propylsulfamoylbenzenesulfonamlde By substituting for the 3-chloro-4-di-n-butylsulfamoylbenzenesulfonyl chloride of Example 1, Step C, an equimolar quantity of 3-chloro-4-di-n-propylsulfarnoylbenzenesulfonyl chloride and by following substantially the procedure described therein, there is obtained 3-chloro- 4-di-n-propylsulfamoylbenzenesulfonamide, M.P. 93 95 C Elemental analysis for 'C 'H ClN 'O S .Calcd. (percent): C, 40.61; H, 5.40; N, 7.90. Found (percent): C, 40.31; H, 5.28; N, 7.85.

Step D: Nacetyl--dt-n-propylsulramoyl- 3-chlorobenzenesnlfonamide By substituting for the 3-chloro-4-di-n-butylsnlfornoylbenzenesulfonamide of Example 1, Step D, an equimolar quantity of 3-chloro 4 di-n-propylsulfamoylbenzenesulfonamide and following substantially the procedure described therein, there is obtained N-acetyl-4-di-n-propylsulfamoyl-3-chlorobenzenesulfonamide, M.P. 156 -158 C.

Elemental analysis for C H ClN O S .-Calcd. (percent): C, 42.36; H, 5.33; N, 7.06. Found (percent): C, 42.58; H, 5.32; N, 7.10.

EXAMPLE 8 N-acetyl-4-di-n-butylsulfamoyl-3-chlorobenzenesu'lfonamide Step A: 2-chloro-4-sulfamoy1benzenesulfonyl chloride A suspension of 3-chlorosulfani'lamide (20 g.) in acetic acid (90 ml.) and concentrated hydrochloric acid (40 m1.) at 0 C. is converted to the diazonium salt by the addition of a solution of sodium nitrite (7 g.) in water. To a solution of sulfur dioxide (30 g.) in acetic acid (60 ml.) a solution of cupric chloride (5 g.) in water (10 ml.) is added. The diazonium salt solution then is added to the sulfur dioxide solution. After standing several hours, the product is precipitated by the addition of water to yield 16 g. of 2-chloro-4-sulfamoylbenzenesulfonyl chloride, M.P. 126-129 C.

Step B: 3-ch1oro-4-dl-n-buty1sulfamoylbenzenesuzl'fonamide A solution of di-n-butylamine (10.4 g.) in acetone (60 ml.) is cooled and stirred while 2-chlor0-4-sulfamoylbermenesulfonyl chloride (10 g.) is added. The reaction is warmed on the steam bath for a short period of time and then the solvent is removed. Treatment of the residue with water and a little acid yields 3-chloro-4-di-n-butylsulfamoylbenzenesulfonamide.

Step C: N-acety1-4-di-n-butylsulfamoyl- 3-chlorobenzenesulfonamide By following the procedure as described in Example 1, Step D, there is obtained N-acetyl-4-di-n-butylsulfamoyl-3-chlorobenzenesulfonamide.

EXAMPLE 9 N-acetyl-4-dipentylsulfamoyl-3-chlorobenzenesulfonamide Star) A: "-ehloro4-dipentylsulfamoylbenzenesulfionamide EXAMPLE 10 N-acetyl-4-hexylsulfamoyl-3-ch1orobenzenesulfonamide Step A: 3-ehloro-4-hexylsulfamoylbenzenesulfonamide By substituting for the di-n-butylamine of Example 8, Step B, an equimolar quantity of monohexylamine and by following substantially the procedure described therein, there is obtained 3-chloro-4-hexylsulfamoylbenzenesulfonamide.

Step B N-acetyl--lrexylsulfamoyl- '3-ehlorobenzenesulfonamide By substituting for the 3-chloro-4-di-n-butylsulfamoylbenzenesulfonamide of Example 1, Step D, an equimolar quantity of 3 chloro-4-hexylsulfamoylbenzenesulfonamide and by following substantially the procedure described therein, there is obtained N-acetyl-4-hexylsulfamoyl-3-chlorobenzenesulfonamide, M.P. 1111l3 C.

Elemental analysis for C H ClN O S- .Calcd. (percent): C, 4236; H, 5.33; N, 7.06. Found (percent): C, 42.62; H, 5.36; N, 7.29.

EXAMPLE 11 N-acetyl-4-di-n-butylsulfamoyl-3-methylbenzenesultonamide, diethylamine salt Step A: 2-methyl-4-sulfamoylbenzenesulfonyl chloride By substituting in Example 8, Step A, for the 3-chlorosulfanilamide recited therein an equirnolar quantity of 3-methylsulfanilamide and by following substantially the 13 procedure described therein, there is obtained 2-methyl 4-sulfamoylbenzenesulfonyl chloride.

' Step B: 3-methyldi-nmutylsulfamoylbenzenesulfonamtde By substituting for the 2-chloro-4-sulfamoylbenzenesulfonyl chloride of [Example 8, Step B, an equimolar quantity of 2-methyl-4-sulfamoylbenzenesulfonyl chloride and by following substantially the procedure described therein, there is obtained 3-methyl-4-di-1i-butylsulfamoylbenzenesulfonamide.

Step C: N-aeetylA-di-n-butylsulfamoylB-methydbenzenesulfonamide, diethylamine salt By substituting for the 3-chloro-4-di-n-butylsulfamoylbenzenesulfonamide of Example 1, Step D, an equimolar quantity of 3 methyl 4 di-n-butylsulfamoylbenzenesulfonamide and by following substantially the procedure described therein, there is obtained 'N-acetyl-4-di-n-butylsulfamoyl-3-methylbenzenesulfonamide, which is isolated as its diethylamine salt, M.P. 120122 C.

Elemental analysis for C H N O S .Calcd. (percent): C, 52.80; H, 8.23; N, 8.80. Found (percent): C, 53.05; H, 8.16; -N, 9.01.

I EXAMPLE 12 N-acetyl-4-di-n-butylsulfamoyl-3-chlorobenzenesulfonarnide amide.

EXAMPLE 13 I N-propionyl-3-chloro-4-di-n-butylsulfamoyl benzenesulfonamide 3 chloro 4 di-n-butylsulfamoylbenzenesulfonamide (7.6 g.) is dissolved in n-propionyl chloride (5 g.) and heated under reflux for /2 hour on the steam bath. The excess propionyl chloride is removed under reduced pressure and the residual oil is treated with aqueous sodium bicarbonate. The aqueous mixture is extracted with ether to remove some impurity and then carefully acidified to precipitate the product. Recrystallization from etherpetroleum ether yields 5.1 g. of N-propionyl3-chloro- 4 di-n-butylsulfamoylbenzenesulfonamide, M.P. 86- 88" C.

Elemental analysis for C H ClN O S .-Calcd. (percent): C, 46.51; H, 6.20; N, 6.38. Found (percent): C, 46.40; H, 5.91; N, 6.51.

EXAMPLE 14- N-n-butyryl-3-chloro-4-di-n-butylsulfamoylbenzenesulfonamide By substituting n-butyryl chloride (6.5 g.) for the n-propionyl chloride in Example 13, and by following the procedure described therein, there is obtained 3.9 g. of N-n-butyryl 3 chloro 4 di-n-butylsulfamoylbenzenesulfonamide, M.P. 7880" C.

Elemental analysis for C H ClN O S .Calcd. (percent): C, 47.22; H, 6.45; N, 6.18. Found (percent): C, 47.76; H, 6.33; N, 6.18.

EXAMPLE 15 N-acetyl-4-di-n-butylsulfamoylbenzenesulfonamide Step A: 4-dl-n-butylsulfalnoylbenzenesulfonamide 4-sulfamoylbenzenesulfonyl chloride g.) is added slowly in portions to a cooled solution of di-n-butylamine (10 g.) in acetone (50 ml.) with stirring. The mixture is warmed on the steam bath after which the solvent is removed under reduced pressure. Water is added to 14 the residual oil and the mixture is acidified to afford the solid crude product. Recrystallization from benzene and hexane yields 12.4 g. of 4-di-n-butylsulfamoylbenzenesulfonamide, M.P. 133l34 C.

Elemental analysis for C H gN O S .Calcd. (percent): C, 48.25; H, 6.94; N, 8.04. Found (percent): C, 48.08; H, 6.61; N, 8.07.

Step B: N-acetyl-4-dln-butylsulfamoylbenzenesulfon-amide By substituting 4 d n butylsulfamoylbenzenesulfonamide for the 3-chloro-4-di-n-butylsulfamoylbenzenesulfonamide of Example 1, Step D, and by following substantially the procedure described therein, there is obtained N-acetyl-4-di-n-butylsulfamoylbenzenesulfonamide which displays a dual melting point, melting at 102104 C. and then resoldifying and remelting at 106107 C.

Elemental analysis for C H N O S .Calcd. (percent): C, 49.21; H, 6.71; N, 7.17. Found (percent): C, 49.30; H, 6.43; N, 6.93.

EXAMPLE l6 N-trichloroacetyl-4-di-n-propylsulfamoylbenzenesulfonamide By substituting an equimolar quantity of 4-di-n-propylsulfamoylbenzenesulfonamide and trichloroacetyl chloride for the 3-chloro-4-di-n-butylsulfamoylbenzenesulfonamide and acetyl chloride of Example 1, Step D, and by following substantially the procedure described therein, there is obtained N-trichloroacetyl-4-di-n-propylsulfamoylbenzenesulfonamide, M.P. 136138 C.

Elemental analysis for C H Cl N O S .--Calcd. (percent): C, 36.10; H, 4.11; N, 6.02. Found (percent): C, 36.47; H, 4.16; N, 6.02.

EXAMPLE 17 N-trichloroacety1-4-di-n-butylsulfamoylbenzenesulfonamide By substituting an equimolar quantity of 4-di-n-butylsulfamoylbenzenesulfonamide and trichloroacetyl chloride for the 3-chlor0-4-di-n-butylsulfamoylbenzenesulfonamide and acetyl chloride of Example 1, Step D, and by following substantially the procedure described therein, there is obtained N-trichloroacetyl-4-di-n-butylsulfamoylbenzenesulfonamide, M.P. 110l11 C.

Elemental analysis for C H Cl N O S .Calcd. (percent): C, 38.9l; H, 4.69; N, 5.67. Found (percent): C, 38.89; H, 4.45; N, 5.62.

EXAMPLE 18 N-acetyl-4-dipentylsulfamoylbenzenesulfonamide, diethylamine salt Step A: 4-dipentylsulfamoylbenzeuesulfonamlde By substituting for the di-n-butylamine of Example 15, Step A, an equimolar quantity of dipentylamine and by following substantially the procedure described therein, there is obtained 4-dipentylsulfamoylbenzenesulfonamide, M.P. 133135 C.

Elemental analysis for C H N O S .Calcd. (percent): C, 51.03; H, 7.50; N, 7.44. Found (percent): C, 51.59; H, 7.25; N, 7.58.

Step B: Nacetyl-4-d1pentylsulfamoylbenzene sulfonamide diethylamine salt By substituting for the 3-chloro-4-di-n-butylsulfamoylbenzenesulfonamide of Example 1, Step D, an equimolar quantity of 4-dipentylsulfamoylbenzenesulfonamide and by following substantially the procedure described therein, there is obtained N-acetyl-4-dipentylsulfamoylbenzenesulfonamide, which is isolated as its diethylamine salt, M.P. 74-76 C.

Elemental analysis for C H N O S .Calcd. (percent): C, 53.74; H, 8.41; N, 8.54. Found (percent): C, 53.65; H, 7.94; N, 8.51.

1 EXAMPLE 19 N-acetyl-4-hexylsulfarnoylbenzenesulfonarnide Step A: 4-hexylsulfamoylbenzenesulfonamide By substituting for the di-n-butylamine of Example 15, Step A, an equimolar quantity of monohexylamine and by following substantially the procedure described therein, there is obtaianed 4-hexylsulfarnoylbenzenesulfonamide, M.P. l72173 C.

Elemental analysis for C H N O.,S .Calcd. (percent): C, 44.98; H, 6.29; H, 8.74. Found (percent): C, 45.11; H, 6.06; N, 8.75.

Step B: N-acetyl-d-hexylsulfamoylbenzenesulfouamide By substituting for the 3-chloro-4-di-n-butylsulfamoylbenzenesulfonamide of Example 1, Step D, an equimolar quantity of 4-hexylsu1famoylbenzenesulfonamide and by following substantially the procedure described therein, there is obtained N-acetyl-4-hexylsulfamoylbenzenesulfonamide, M.P. 143 l45 C.

Elemental analysis for C H N O S .Calcd. (percent): C, 4639; H, 6.12; N, 7.73. Found (percent): C, 46.26; H, 5.89; N, 7.69.

EXAMPLE 20 N-acetyl-4-di-n-butylsulfarnoyl-3-trifluoromethyl benzenesulfonamide Step A: N,N-di-n-butyl-4-nitro-2-triflnoromethylbenzeuesulfonamide 4-nitro-2-trifiuoromethylbenzenesulfonyl chloride (16.5 g.) is added to di-n-butylamine (16 g.) in acetone (200 ml.) with stirring. The reaction mixture is warmed on a steam bath and then the solvent removed at reduced pressure. To the residue is added water and then the mixture is acidified with dilute hydrochloric acid to afiord the solid crude product which is extracted with ether and dried over sodium sulfate. After removal of the drying agent, the solution is concentrated to dryness and the residue recrystallized from petroleum ether to yield 17.7 g. of N,N-di-n-butyl-4-nitro 2 trifluoromethylbenzenesulfonamide, M.P. 50-51 C.

Elemental analysis for C H F N O S.-Calcd. (percent): C, 47.l1; H, 5.54; N, 7.33. Found (percent): C, 48.01; H, 5.46; N, 7.29.

Step B: N ,N -di-n-butyl2-tritl'u0romethylsulfanllamide To a suspension of iron powder g.) in water (500 ml.) and acetic acid (25 m1.) warmed to 70 C. is added with good stirring N,N-di-n-butyl-4-nitro-2-trifiuoromethylbenzenesulfonamide (15 g.) in about 5 equal portions at such a rate as the foaming allows. After the addition, heating at 70-80 C. and good stirring is continued for 1 /2 hours. The reaction mixture is cooled and extracted with ether by decantation (4X 300 ml.). On removal of the ether and recrystallization of the residue from etherpetroleum ether there is obtained 12.3 g. of N ,N -di-nbutyl-2-trifiuoromethylsulfanilamide, M.P. l35136 C.

Elemental analysis for C H F N O S.Calcd. (percent): C, 51.12; H, 6.58; N, 7.95. Found (percent): C, 51.64; H, 6.38; N, 7.93.

Step C: 4-di-n-bntylsulfamoyl-3-trifluoromethylbenzenesulfonyl chloride By substituting for the N ,N -di-n-butyl-2-chlorosulfanilamide of Example 1, Step B, an equimolar quantity of N ,N -di-n-butlyl-2-trifiuor0methylsulfanilamide and by following substantially the procedure described therein, there is obtained 4-di-n-butylsulfamoyl-3-trifluoromethylbenzenesulfonyl chloride, M.P. 7l-72 C.

Step D: 4-di-n-butylsulfamoyl-3-trlfiuoromethylbenzeuesulfonamide By following substantially the procedure as described in Example 1, Step C, and by substituting for the 3-chloro- 4-di-n-butylsulfamoylbenzenesulfonyl chloride an equimolar quantity of 4-di-n-butylsulfamoyl-3-trifluoromethylbenzenesulfonyl chloride, there is obtained 4-di-n-butylsulfamoyl 3 trifluoromethylbenzenesulfonamide, M.P. 116117 C.

Elemental analysis for C H F N O S..Calcd. (percent): C, 43.26; H, 5.56; N, 6.73. Found (percent): C, 43.15; H, 5.07; N, 6.71.

. methylbenzenesulfonamlde By following substantially the procedure described in Example 1, Step D, and by substituting for the 3-chl-oro-4- di n butylsulfamoylbenzenesulfonamide an equimo-lar quantity of 4-di-n-butylsulfamoyl-3-trifiuoromethylbenzenesulfonarnide, there is obtained N-acetyl-4-di-n-butylsulfamoyl 3 trifiuoromethylbenzenesulfonamide, M.P. 118-120 C. I

Elemental analysis for C H F N O S .Calcd. (percent): C, 44.53; H, 5.50; N, 6.11. Found (percent): C, 44.78; H, 5.56; N, 6.08.

EXAMPLE 21 N-acetyl-4-di-n-butylsulfamoyl-3- fiuorobenzenesulfonamide I Step A: N -acetyl-N ,N di-n-butyl-2-fluorosulfantlamide m-Fluoroacetanilide (153 g.) is added to chlorosulfonic acid (330 ml.). After heating at 60'65 C. for 2 hours the solution is cooled and poured onto crushed ice to yield 56 g. of crude 2-fluoro-N-acetylsulfanilyl chloride which is added to di-n-butylamine (75 g.) in benzene (200 ml.) After heating on the steam bath "/2 hour the reaction is cooled and Washed with a mixture of water (200 ml.) and concentrated hydrochloric acid ml.). After drying the organic phase over sodium sulfate the drying agent is removed and the solvent removed at reduced pressure to yield 41 g. of crude product, N -acetyl-N ,N di-nbutyl 2 fluorosulfanilamide, M.P. 70-72 C. Recrystallization from ether yields N -acetyl-N ,N di-nbutyl-Z-fiuorosulfanilamide, M.P. 72-74 C.

Elemental analysis for C H FN 0 S.Calcd. (percent): C, 55.79; H, 7.32; N, 8.13. Found (percent): C, 56.30; H, 7.02; N, 8.19.

Step B: N ,N -dim-butyLZ-fluorosulfanilamtde N acetyl N ,N -di-nbutyl-2-fluorosulfanilamide (40 g.) in hydrochloric acid ml., 6 N) and ethanol (200 ml.) is heated on the steam bath for 3 hours. The reaction mixture is cooled and made basic with a 40% solution of sodium hydroxide to yield 29.5 g. of N ,N -di-nbutyl-Z-fluorosulfanilamide.

Step C: et-di-n-butylsulfamoyl-3-tinorobenzenesulfonyl chloride By following substantially the procedure as described in Example 1, Step B, and by substituting for the N ,N.}- di-n-butyl-2-chlorosulfanilamide recited therein, an equimolar quantity of N ,-N -di-n-butyl-2-fiuorosulfanilamide, there is obtained 4-di-n-butylsulfamoyl-3-fluorobenzenesulfonyl chloride, M.P. 107109 C.

Step D: -dl-n-butylsulfamoyl 3-fluorobenzenesulfonamide By following substantially the procedure as described in Example 1, Step C, and by substituting for the 3-chloro- 4-di-n-butylsulfamoylbenzenesulfonyl chloride an equimolar quantity of 4-di-n-butylsultamoyl-3-fiuorobenzenesulfonyl chloride, there is obtained 4-di-n-butylsulfamoyl- 3-fluorobenzenesulfonamide, M.P. 9395 C.

Elemental analysis for C H FN O 'S .Calcd. (percent): C, 45.88; H, 6.33; N, 7.65. Found (percent): C, 45.26; H, 6.22; N, 7.65.

Step E: N-acetyl-4-di-n-butylsulfamoyl- 3-fluorobenzenesulfonamide By following substantially the procedure as described in Example 1, Step D, and by substituting for the 3-chloro- 4-di-n-butylsulfamoylbenzenesulfonamide an eqnirnolar quantity of 4-di-n-butylsulfamoyl-3-fiuorobenzenesulfonamide, there is obtained N-acetyl-4-di-n-butylsulfamoyl-3- fiuorobenzenesulfonamide, M.P. 7375 C.

1? Elemental analysis for C H FN O S .Calcd. (percent): C, 47.04; H, 6.17; N, 6.86. Found (percent): C, 47.41; H, 5.87; N, 6.88.

EXAMPLE 22 N-acetyl-4-di-n-butylsulfamoylbenzenesulfonamide Step A: N ,N di-n-butylsulfanilamide To a chilled solution of di-n-butylamine (70 g.) in pyridine (150 ml.) is added acetylsulfanilyl chloride (60 g.) in portions and with good stirring. After the addition is complete, the reaction mixture is warmed on the steam bath for 3 hours. The excess pyridine and dibutyl amine are removed under reduced pressure to yield crude N acetyl-N ,N -di-n-butylsulfanilamide as a thick brown oil. A mixture of ethanol 150 ml.), water (250 ml.) and concentrated hydrochloric acid (250 ml.) is added and the reaction mixture heated on the steam bath for 3 hours. The excess ethanol is removed, the reaction mixture cooled and a 40% solution of sodium hydroxide is added until the reaction mixture is basic. The oil that separates soon crystallizes. Recrystallization from ether-hexane yields 57.8 g. of N ,-N -di-n-butylsulfanilamide, M.P. 7173 C.

Elemental analysis for C H N O S.Calcd. (percent): C, 59.12; H, 8.50; N, 9.85. 'Found (percent): C, 59.09; H, 8.35; N, 9.74.

Step B: 4-di-n-butyls'ulfamoylbenzenesulfonyl chloride N ,N -di-n-butylsulfanilamide (0.2 mole) in acetic acid (200 ml.) and concentrated hydrochloric acid (150 ml.) is diazotized at 0 C. with sodium nitrile (14.1 g.) and added carefully to a solution of sulfur dioxide (100 g.) in acetic acid (200 ml.) containing cupric chloride (14 g.). After 2 hours the reaction mixture is filtered to obtain, after drying, 69.5 g. of crude 4-di-n-butylsulfam0yl benzenesulfonyl chloride. Recrystallization from benzene yields 4 di n-butylsulfamoylbenzenesulfonyl chloride, M.P. 124-126 C.

Elemental analysis for C H ClNO S .Calcd. (percent): C, 45.72; H, 6.03; N, 3.81. Found (percent): C, 45.88; H, 6.15; N, 3.79.

Step C: 4-di-n-butylsulfamoylbenzenesulfonamide By following substantially the procedure as described in Example 1, Step C, and by substituting for the 3-chloro 4 di n-butylsulfamoylbenzenesulfonyl chloride recited therein an equimolar quantity of 4-di-n-butylsulfamoylbenzenesulfonyl chloride, there is obtained 4-di-n-butylsulfamoylbenzenesulfonamide.

Step D: N-acetyl-4-di-n-buty1sulfamoylbenzenesulfonamide By following substantially the procedure as described in Example 12 and by substituting for the 3-chloro-4-di-nbutylsulfarnoylbenzenesulfonamide recited therein an equimolar quantity of 4 di n-butylsulfamoylbenzenesulfonamide, there is obtained N acetyl 4 di-n-butylsulfamoylbenzenesulfonamide.

EXAMPLE 23 N-acetyl-4-di-n-propylsulfamoylbenzenesulfonamide Step A N ,N -di-u-propylsulfanilamide By substituting for the di-n-butylamine of Example 22, Step A, an equimolar quantity of di-n-propylamine and by following substantially the procedure described therein, there is obtained N ,N -di-n-propylsulfanilamide.

Step B: 4-di-n-propylsulfamoylbenzeuesulfonyl chloride By substituting for the N ,N -di-n-butylsulfanilamide of Example 22, Step B, an equimolar quantity of N ,N -di-npropylsulfanilamide and by following substantially the procedure described therein, there is obtained 4-di-npropylsulfamoylbenzenesulfonyl chloride.

Step C 4-din-propylsulfamoylbenzeuesulfonamide By substituting for the 3-chloro-4-di-n-butylsulfamoylbenzenesulfonyl chloride of Example 1, Step C,- an equimolar quantity of 4-di-n-propylsulfamoylbenzenesulfonyl chloride and by following substantially the procedure described therein, there is obtained 4-di-n-propylsulfamoylbenzenesulfonamide, M.P. 127 C.

Elemental analysis for C H N O S .Ca1cd. (percent): C, 44.98; H, 6.29; N, 8.74. Found (percent): C, 45.19; H, 6.43; N, 8.81.

benzenesulfonami e By substituting for the 3-chloro 4-di-n-butylsulfarnoylbenzenesulfonamide of Example 12, an equimolar quantity of 4-di-n-propylsulfamoylbenzenesulfonamide and by following substantially the procedure described therein, there is obtained N-acetyl-4-di-n-propylsulfamoylbenzenesulfonamide, M.P. 119120 C.

Elemental analysis for C H N O S .Calcd. (percent): C, 46.39; H, 6.12; N, 7.73. Found (percent): C, 46.49; H, 5.95; N, 7.69.

EXAMPLE 24 N-acetyl-Z-chloro-4-di-n-propylsulfamoylbenzenesulfonamide Step A: 3-chloro-4-sulfamoylbenzenesulfonyl chloride By substituting for the 3-chlorosulfanilamide of Example 8, Step A, an equimolar quantity of 2-chlorosulfanilamide and by following substantially the procedure described therein, there is obtained 3-chloro-4-sulfamoylbenzenesulfonyl chloride, M.P. 158-161 C.

Step B: 2-chlor0-4-di-n-propylsulfamoylbenzenesulfonamide To a solution of dry di-n-propylamine (15 g.) in dry benzene is added 3-chloro-4-sulfamoylbenzenesulfonyl chloride (14.5 g.). The reaction mixture is warmed on the steam bath for 1 hour to remove most of the solvent. The oily residue is triturated with dilute hydrochloric acid to yield 8.1 g. of 2-chloro-4-di-n-propylsulfamoylbenzenesulfonamide, M.P. 124-126 C.

Step C: N-acetyl-2-chloro-4-di-n-propylsulfamoy1- benzenesulfonamide By substituting for the 3-chloro-4-di-n-butylsulfamoylbenzenesulfonamide of Example 1, Step D, an equal quantity of 2-chloro-4-di-n-propylsulfamoylbenzenesulfonamide and by following substantially the procedure described therein, there is obtained N-acetyl-2-chloro-4-di-n-propylsulfamoylbenzenesulfonamide, M.P. 167 C.

Elemental analysis for C H ClN O S .Calcd. (percent): C, 42.36; H, 5.33; N, 7.06. Found (percent): C, 42.71; H, 5.20; N, 7.00.

EXAMPLE 25 N-acetyl-2-chloro-4-di-n-butylsulfamoylbenzenesulfonamide Step A: 2-chlore-4-di-n-butylsulfamoylbenzeuesulfonamide By substituting for the di-n-propylamine of Example 24, Step B, an equimolar quantity of di-n-butylamine and by following substantially the procedure described therein, there is obtained 2-chlor0-4-di-n-butylsulfamoylbenzenesulfonamide, M.P. 8687 C.

Elemental analysis for C H Cl'N O S .Calcd. (percent): C, 43.91; H, 6.05; N, 7.32. Found (percent): C, 44.13; H, 5.88; N, 7.33. I

Step B: N-acetyl-2-chl0ro-4-di-n-butylsulfamoylbenzenesulfonamide By substituting for the 3-chloro-4-di-n-butylsulfamoylbenzenesulfonamide of Example 1, Step D, an equimolar quantity of 2-chloro-4-di-n-butylsulfamoylbenzenesulfonamide and by following substantially the procedure described therein, there is obtained N-acetyl-2-chloro-4-din-butylsulfamoylbenzenesulfonamide, M.P. 133 134 C.

Elemental analysis for C H ClN O S .-Calcd. (percent): C, 45.21; H, 5.93; N, 6.59. Found (percent): C, 45.35; H, 5.50; N, 6.40. I

19 EXAMPLE 2s N-acetyl-4-di-n-butylsulfamoyl-2-trifluoromethylbenzenesulfonamide Step A: -sulfamoyl-3-trifluoromethylbenzenesulfonyl chloride By substituting for the 3-chlorosulfanilamide of Example 8, Step A, an equimolar quantity of Z-trifiuoromethylsulfanilamide and by following substantially the procedure described therein, there is obtained 4-sulfamoyl-3-trifluoromethylbenzenesulfonyl chloride, M.P. 152-154 C.

Step B: 4-di-n-butylsulfamoyl-2-trlfluoromethylbenzenesulfonamide By substituting for the 2-chloro-4-sulfamoylbenzenesulfonyl chloride of Example 8, Step B, an equimolar quantity of 4-su1famoyl-2-trifluoromethylbenzenesulfonyl chloride and by following substantially the procedure described therein, there is obtained 4-di-n-butylsulfamoyl-Z-trifiuoromethylbenzenesulfonamide, M.P. l34-135 C.

Step C: N-acetyl-4-di-n-butylsulfamoyl- Z-trifluoromethylbenzenesulfou'amide By substituting for the 3-chloro-4-di-n-butylsulfamoylbenzenesulfonamide of Example 1 an equimolar quantity of 4 di-n-butylsulfarnoyl-Z-trifluoromethylbenzenesulfonamide and by following substantially the procedure described therein, there is obtained N-acetyl-4-di-n-butylsulfamoyl 2 trifluoromethylbenzenesulfonamide, M.P. l44-145 C.

Elemental analysis for C H F N O S .Calcd. (percent): C, 44.53; H, 5.50; N, 6.11. Found (percent): C, 44.78; H, 5.31; N, 6.09.

EXAMPLE 27 N-acetyl-4-chloro-3-di-n-propylsulfamoylbenzenesulfonamide Step A: 2-chloro-E-sulfamoylhenzenesulfonyl chloride By substituting for the 3-chlorosulfanilamide of Exam ple 8, Step A, an equimolar quantity of 4-chlorometanilamide and by following substantially the procedure described therein, there is obtained 2-chloro-5-sulfamoylbenzenesulfonyl chloride, M.P. 185187 C.

Step B: 4-chloro-3-di-npropylsulfamoylbenzenesulfonamide By substituting for the 3-chloro-4-sulfamoylbenzenesulfonyl chloride of Example 24, Step B, an equimolar quantity of 2-chloro-5-sulfamoylbenzenesulfonyl chloride and by following substantially the procedure described therein, there is obtained 4-chloro-3-di-n-propylsu1famoylbenzenesulfonamide, M.P. 115 -1 17 C.

Step C: N-acetyI-at-ehloro-3-di-n-propylsulfaruoylbenzenesulfonamide A solution of 4-chloro-3-di-n-propylsulfamoylbenzenesulfonamide (5.3 g.) in dry pyridine (15 ml.) is cooled to 15 C. Aeetyl chloride (1.2 g.) is added and the reaction mixture is stirred at room temperature for 2 hours after which it is poured into dilute hydrochloric acid. An oil separates and soon solidifies. Recrystallization from diethyl ether yields 3.7 g. of N-acetyl-4-chloro-3-di-n-propylsulfamoylbenzenesulfonamide, M.P. 13l-133 C.

Elemental analysis for C H ClN O S .-Calcd. (percent): C, 42.36; H, 5.33; N, 7.06. Found (percent): C, 42.93; H, 5.55; N, 7.03. K

EXAMPLE 28 N-acetyl-4-chloro-3-di-n-butylsulfamoylbenzenesulfonamide Step A: 4-chloro-3-di-n-butylsulfamoylbenzenesulfonamide By substituting for the 3-chloro4-sulfamoylbenzenesulfonyi chloride and din-propylamine in Example 24, Step B, an equirnolar quantity of 2-chloro-5-sulfamoylbenzenesulfonyl chloride and di-n-butylamine and by following substantially the procedure described therein, there 20 is obtained 4-chloro-3-di-n-butylsulfamoylbenzenesulfonamide, M.P. 7476 C.

Elemental analysis for C H ClN O S .Calcd. (percent): C, 43.91; H, 6.05; N, 7.32. Found (percent): C, 44.34; H, 6.02; N, 7.45.

Step B: N-acetyl-l-chlor0-3-di-nbutylsulfamoylbenzenesulfonamide By substituting for the 4-chloro-3-di-n-propylsulfamoylbenzenesulfonamide of Example 27, Step C, an equimolar quantity of 4-chloro3-di-n-butylsulfamoylbenzenesulfonamide and by following substantially the procedure described therein, there is obtained Nacetyl-4-chloro-3-din-butylsulfamoylbenzenesulfonamide, M.P. 144l46 C.

Elemental analysis for C H ClN O S .Calcd. (percent): C, 45.21; H, 5.93; N, 6.59. Found (percent): C, 45.57; H, 5.92; N, 6.36.

EXAMPLE 29 N-acetyl-3-di-n-propylsulfamoylbenzenesulfonamide Step A: 3-sulfamoylbenzenesulfouy1 chloride By substituting for the 4-chlorornetanilamide of Ex ample 27, Step A, an equimolar quantity of metanilamide and by following substantially the procedure described therein, there is obtained 3-sulfamoylbenzenesulfonyl chloride.

Step B: 3-di-n-propylsulfamoylhenzenesulfonamide By substituting for the 2-chloro-5-sulfamoylbenienesulfonyl chlorideof Example 27, Step B, an equimolar quantity of 3-sulfamoylbenzenesulfonyl chloride and by following substantially the procedure described therein, there is obtained 3-di-n-propyls-ulfamoylbenzenesulfonamide, M.P. -117 C.

Elemental analysis for C H N O S .-Calcd. (percent): C, 44.98; H, 6.29; N, 8.74. Found (percent): C, 44.88; H, 5.96; N, 8.71.

Step C N-acetyl-3 di n-pr opylsulfamoyl benzenesulfonamide By substituting for the 4-chloroS-di-n-propylsulfamoylbenzenesulfonamide of Example 27, Step C, an equimolar quantity of 3-di n propylsulfamoylbenzenesulfonamide and by following substantially the procedure described therein, there is obtained N-acetyl-3-di-n-propylsulfamoyl+ benzenesulfonamide, M.P. 104106 C.

Elemental analysis for C H N O' S .Calcd. (percent): C, 46.39; H, 6.12; N, 7.73; Found (percent): C, 46.77; H, 6.09; N, 7.63.

EXAMPLE 30 'N-acetyl-4-di-n-butylsulfamoylbenzenesulfonamide Step A: Sodium acetamlde To a stirred solution of acetamide (4.1 g., 0.07 mole) in liquid ammonia ml.) is added sodium (1.6 g., 0.07 g. atom) in small portions. A blue color develops immediately after each addition which slowly fades to be replaced by a white precipitate. After all the sodium had been added, the excess ammonia is allowed to evaporate under a stream of dry nitrogen to yield sodium acetamide.

Step B: N-acetyl-4-d'i-n-hutylsulfamoylbenzenesulfonamide EXAMPLE 31 N-acetyl-4-di-n-butylsulfamoylnaphthalene-l-sulfonamide Step A: 4-sulfamoylnaphthalene-l-sulfonyl chloride By substituting for the 3-chlorosulfanilamide of Example 8, Step A, an equimolar quantity of l-aminonaphthalene-4-sulfonamide and by following substantially the procedure described therein, there is obtained 4-sulfamoylnaphthalene-l-sulfonyl chloride, M.P. l81-183 C.

Step 13: 4-di-n-butylsu1famoylnaphthalene l-sulfonamide The 4-sulfamoylnaphthalene-l-sulfonyl chloride (10 g.) is added to a mixture of di-n-butylamine (50 g.) and acetone (50 ml.) while the reaction mixture is stirred and cooled. The reaction mixture is warmed on the steam bath for /2 hour. Ice water and a 10%- sodium hydroxide solution (50 ml.) are added and the excess di-n-butylamine is extracted with ether. Acidification of the aqueous phase yields 4-di-n-butylsulfamoylnaphthalene-l-sulfonamide. Recrystallization from a mixture of benzene and hexane yields substantially pure 4-di-n-butylsulfamoylnaphthalene-l-sulfonamide, M.P. 123-125 C.

Elemental analysis for C H N O S .Calcd. (percent): C, 54.24; H, 6.58; N, 7.03. Found (percent): C, 54.40; H, 6.57; N, 7.11.

Step C N-acetylA-dim-butylsulfamoylnaphth alenel sulfonamide By substituting for the 3-chloro-4-di-n-butylsulfamoylbenzenesulfonamide of Example 12 an equimolar quantity of 4-di-n-butylsulfamoylnaphthalene-l-sulfonamide and by following substantially the procedure described therein, there is obtained N-acetyl-4-di-n-butylsulfamoylnaphthalene-l-sulfonamide, M.P. 192194 C.

Elemental analysis for C H N O S .Calcd. (percent): C, 54.52; H, 6.41; N, 6.36. Found (percent): C 54.78; H, 6.54; N, 6.47.

EXAMPLE 32 N-acetyl-4-di-n-butylsulfamoyl-Z-nitrobenzenesulfonamide Step A: N,N-di-n-hutyl-4'chloro-3-nltrobenzenesulfonamide A solution of di-n-butylamine (111 g., 0.86 mole) in acetone (300 ml.) is cooled in an ice bath and stirred While 4-chloro-3-nitrobenzenesulfonyl chloride (112 g., 0.43 mole) is added in several portions. The resultant yellow suspension is stirred for 1 hour and then most of the acetone removed by heating on a steam bath. The reaction mixture is diluted with Water (300 ml.) and cooled to yield 132 g. of N,N-di-n-butyl-4-chloro-3-nitrobenzenesulfonamide, M.P. 7072 C.

Step B: N ,N -di-n-butyl-3-nitrosulfanilamide A mixture of N,N-di-n-butyl-4-chloro-3-nitrobenzenesulfonamide (90 g.) in (weight per unit volume) ammonia in ethanol is heated in an autoclave at 110 C. for 5 hours. On cooling, the slurry is filtered and the filtrate concentrated to yield N ,N -di-n-butyl-S-nitrosulfanilamide. Recrystallization from ether yields 49 g. of substantially pure product, M.P. 86-88- C.

Step C: 4-di-n-butylsulfamoyl-2-nitrobenzenesulfonyl chloride By substituting for the N ,N -di-n-butyl-2-chlorosulfanilamide of Example 1, Step B, an equimolar quantity of N ,N -di-n-butyl-3-nitrosulfanilamide and by following substantially the procedure described therein, there is obtained 4- di n butylsulfarnoyl 2 nitrobenzenesulfonyl chloride, M.P. 110112 C.

Step D: 4-di-n-buty1suIfamoyl2-nitrobenzenesulfonamide By substituting for the 3-chloro-4-di-n-butylsulfamoylbenzenesulfonyl chloride of Example 1, Step C, an equimolar quantity of 4-di-n-butylsu]famoyl-2-nitrobenzenesulfonyl chloride and by following substantially the pro- 22 cedure described therein, there is obtained 4-di-n-butylsulfamoyl-2-nitrobenzenesulfonamide.

Step E: N-acetyl-4-di-n-buty1sulfamoy1-2-nitrobenzenesulfonamide By substituting for the 3-chloro-4-di-n-butylsulfamoylbenzenesulfonamide of Example 12 an equimolar quantity of 4-di-n-butylsulfamoyl-Z-nitrobenzenesulfonamide and by following substantially the procedure described therein, there is obtained N-acetyl-4-di-n-butylsulfamoyl2-nitrobenzenesulfonamide, M.P. 11l-l13 C., after recrystallization from ether-petroleum ether.

Elemental analysis for C H N O S .Calcd. (percent): C, 44.12; H, 5.79; N, 9.65. Found (percent): C, 43.91; H, 5.67; N, 9.56.

EXAMPLE 33 N-acetyl-4-di-n-butylsulfamoyl-3-nitrobenzenesulfonamide Step A: 4-su1fam0yl-2-nitrobenzenesulfony1 chloride A suspension of 3-nitrosulfanilamide (32 g.) in acetic acid 160 ml.) and hydrochloric acid (150 ml.) is cooled to 15 C. and stirred while a solution of sodium nitrite (10.2 g.) in water (20 ml.) is added as rapidly as possible while the temperature was maintained between 15 C. and 20 C. This requires about 10 minutes. Meanwhile, sulfur dioxide (70 g.) is dissolved in acetic acid (150 ml.). A solution of cupric chloride (10 g.) in water (20 ml.) is added to the sulfur dioxide solution after Which the diazonium salt is added as rapidly as foaming would allow. After standing for 2 hours, the reaction mixture is diluted to 2 liters with water. After another hour the product is collected and recrystallized from a mixture of ether and petroleum ether to yield 4-sulfamoyl-2-nitrobenzenesulfonyl chloride, M.P. 133135 C.

Step B: 4-dl-n-butylsulfamoyl-B-nltrobenzenesulfonamide Di-n-butylamine (20 g.) in acetone (20 ml.) is cooled and stirred while 4-sulfamoyl-2-nitrobenzenesulfonyl chloride (15 g.) is added in several portions. The reaction mixture is heated on the steam bath for 1 hour, cooled, and poured into water (300 ml.). An oily product resulted on acidification. The product is dissolved in ether and extracted into a dilute sodium hydroxide solution (500 ml. of 2%). Acidification of the aqueous phase yields 12.5 g. of crude product. Recrystallization from a mixture of ether and petroleum ether yields 4-di-n-butylsulfamoyl-3- nitrobenzenesulfonamide, M.P. 130-132 C.

Step C: N-acetyli d1-n-butylsulfamoyl-3-nitrobenzenesulfonamide By substituting for the 3-chloro-4-di-n-butylsulfamoylbenzenesulfonamide of Example 12 an equimolar quantity of 4-di-n-butylsulfamoyl-3-nitrobenzenesulfonamide and by following substantially the procedure described therein, there is obtained N-acetyl-4-di-n-butylsulfamoyl-3-nitrobenzenesulfonamide, M.P. 83 85 C. after recrystal lization from a mixture of ether and petroleum ether.

Elemental analysis for C H N 0 S .-Calcd. (percent): C, 44.12; H, 5.79; N, 9.65. Found (percent): C, 44.10; H, 5.81; N, 9.69.

EXAMPLE 34 N-sodium-N-acetyl-4-di-n-butylsulfamoyl-3-chlorobenzenesulfonamide monohydrate To a 500 ml. round-bottomed flask fitted with stirrer under a nitrogen atmosphere was added ethanol ml.) and N acetyl-4-di-n-butylsulfamoyl-3-chlorobenzenesu1- fonamide (42.5 g., 0.10 mole). To this clear solution is added a solution of sodium methoxide (5.3 g., 0.098 mole) in ethanol (50 ml.). The reaction mixture is stirred at room temperature for 15 minutes and filtered to remove the insoluble impurities. The filtrate was concentrated under vacuum (at less than 50 C.) to a volume of 43 ml. and diethyl ether (850 ml.) added to precipitate a gummy solid. To this mixture is added water (8.5 ml.) to dissolve the precipitate. The clear solution is seeded and stirred for one hour at room temperature and /2 hour at 5 C. The precipitate is collected, washed with diethyl ether (100 ml.) and dried at 50 C. at reduced pressure to yield 43.0 g. of N-sodium-N-acetyl-4-n-butylsulfamoyl-3-chlorobenzenesulfonamide monohydrate.

Elemental analysis for C H O N S ClNa.Calcd.

(percent): C, 41.33; H, 5.64; N, 6.03. Found (percent):

C, 41.49; H, 5.79; N, 6.00.

EXAMPLE 35 4-di-n-propylsulfamoyl-N-methanesulfonylbenzenesulfonamide Step A: 4-di-n-propylsulfamoylbenzenesulfonyl chloride A mixture of N ,N -di-n-propylsulfanilamide (30 g.) in acetic acid (100 ml.) and concentrated hydrochloric acid (80 ml.) is cooled to 0 C. in an ice and salt bath and stirred while sodium nitrite (8.4 g.) in water (25 ml.) is added, slowly, dropwise at such a rate that the temperature remains below 5 C. Meanwhile, sulfur dioxide (60 g.) is dissolved in acetic acid (125 ml.). To this is added cupric chloride (8.0 g.) in water (15 ml.). When the diazotization reaction is complete, it is added carefully to the sulfur dioxide solution as rapidly as foaming allows. After standing for 2 hours the product is removed by filtration, washed well with water and air dried. There is obtained 35.3 g. of 4-di-n-propylsulfamoylbenzenesulfonyl chloride, M.P. 125 -127 C. The product could be recrystallized from acetic acid and water raising the melting point to l26-128 C.

Elemental analysis for C H ClNO S.Calcd. (percent): C, 42.4l; H, 5.34; N, 4.12. Found (percent): C, 42.30; H, 5.08; N, 4.07.

Step B: 4di-u-propylsulfamoyl-N-methanesulfonylbenzenesulfonamide A solution of methanesulfonamide (4.8 g., 0.05 mole) in dry benzene (100 ml.) is stirred while 2 g. of a 59.8% suspension of sodium hydride in mineral oil is added. The reaction then is heated under reflux and stirred for /2 hour. A solution of 17 g. (0.05 mole) of 4-din-propylsulfamoylbenzenesulfonyl chloride in dry benzene 100 ml.) is added. The reaction is heated for 3 hours on the steam bath. About half the solvent is then removed by distillation and a 5% sodium hydroxide solution (150 ml.) and enough diethyl ether to cause the organic phase to separate is added. The aqueous phase is acidified to give 9.1 g. of 4-di-n-propylsulfamoyl-N-'nethanesulfonylbenzenesulfonamide, M.P. 120122 C. It is recrystallized from benzene and hexane without change in melting point.

Elemental analysis for C H N O S .-Calcd. (percent): C, 39.16; H, 5.56; N, 7.03. Found (percent): C, 39.07; H, 5.26; N, 7.00.

EXAMPLE 36 3-ch1oro-4-di-n-propylsulfamoyl-N-methanesulfonylbenzenesulfonamide Step A: 8-chloro-4-di-n-propylsulfamoylbenzenesulfonyl chloride By substituting2-chloro-N ,N -di-n-propylsulfanilamide for the N ,-N -di-n-propylsulfanilamide of Step A, Example 35, and by following substantially the procedure described therein, there is obtained 3-chloro-4-di-n-propyl sulfamoylbenzenesulfonyl chloride, M.P. 9395 C.

Step B: 3 chloro-a-dl-n-propylsulfamoyl- N-methauesulfonylbenzenesulfonamide I By substituting for the 4-di-n-propylsulfamoylbenzenesulfonyl chloride of Example 35, Step B, an equimolar quantity of 3 chloro-4-di-n-propylsulfamoylbenzenesulfonyl chloride there is obtained 3-chloro-4-di-n-propylsulfamoyl N-methanesulfonylbenzenesulfonamide, M.P. 132133 C.

24 Elemental analysis for C H ClN O S .Calcd. (percent): C, 39.16; H, 5.56; N, 7.03. Found (percent): C, 39.07; H, 5.27; N, 7.00.

EXAMPLE 37 N,N-bis(4-di-n-propylsulfamoylbenzenesulion)amide By substituting an equimolar quantity of 4-di-n-propylsulfamoylbenzenesulfonamide for the methane sulfonamide of Example 35, Step B, and by following substantially the procedure described therein, there is obtained N,N bis(4 di-n-propylsulfamoylbenzenesulfon)amide, M.P. 197l99 C.

Elemental analysis for C 4H N O S .Calcd. (percent): C, 46.21; H, 5.98; N, 6.74. Found (percent): C, 46.22; H, 5.68; N, 6.74.

EXAMPLE 38 3-trifluoromethyl-4-di-n-butylsulfamoyl-N-methanesulfonylbenzenesulfonamide To a solution of 4 di-n-butylsulfamoyl 3 trifinoromethylbenzenesulfonamide (0.1 mole) in benzene ml.) and pyridine (10 ml.) at 25 C. is added methanesulfonyl chloride (0.1 mole). The reaction is refluxed for one hour on a steam bath and the solvent removed at reduced pressure to yield 3-trifluoromethyl-4-di-n-butylsulfamoyl-N-methanesulfonylbenzenesulfonamide.

EXAMPLE 39 3-chloro-4-di-n-butylsulfamoyl-N-methanesulfonylbenzenesulfonamide To a solution of 3-chloro-4-di-n-butylsulfamoylbenzenesulfonamide (0.1 mole) in pyridine (100 ml.) is added methanesulfonyl chloride (0.1 mole). The reaction is refiuxed for one hour and the solvent removed at reduced pressure to yield 3-chloro-4-di-n-butylsulfamoyl-N-methanesulfonyl-benzenesulfonamide.

EXAMPLE 40 3-trifiuoromethyl-4-di-n-butylsulfamoyl-N-benzenesulfonylbenzenesulfonamide 4-di-n-butylsulfamoyl 3 trifluoromethylbenzenesulfonamide (0.1 mole) is suspended in benzenesulfonic acid anhydride (50 ml.). To this is added 2 drops of concentrated sulfuric acid. The reaction mixture is heated for one hour on the steam bath. The reaction mixture is cooled and extracted with ether. The ether solution is washed with water and then dried over anhydrous magnesium sulfate. Removal of the ether yields 3'-trifluoromethyl 4 di n-butylsulfamoyl-N-benzenesulfonylbenzenesulfonamide.

EXAMPLE 41 3-trifiuoromethyl-4-di-n-butylsulfamoyl-N-methanesulfonylbenzenesulfonamide 4 di n-butylsulfamoyl-3-trifluoromethylbenzenesulfonamide (0.1 mole) is suspended in methanesulfonic acid anhydride (0.1 mole). Two drops of concentrated sulfuric acid are added and the reaction mixture heated for one hour on the steam bath. The reaction mixture is cooled and extracted with ether. The ether solution is washed with Water and dried over anhydrous magnesium sulfate. The ether solution is filtered and the ether re-- moved to yield 3-trifluoromethyl-4-di-n-butylsulfamoyl-N- methanesulfonylbeuzenesulfonamide.

In a manner similar to that described in Example 21 for the preparation of N-acetyl-4-di-n-butylsulfamoyl-3- fluorobenzenesulfonamide the N-acyl-rnono-substituted or di-substituted sulfamoylbenzenesulfonamides of this invention may be obtained. Thus, by substituting the appropriately substituted acetanilide for the m-fluoroacetanilide of Example 21, Step A, and following substantially the procedure described in Steps A through E of that example, the N-acyl-mono-substituted and di-substituted sulfamoylbenzenesultonamides f his inv ntion may e 3,709,917 25 26 obtained. The following equation illustrates the reaction acyl-mono-substituted and di-substituted sulfamoylbenof Example 21, Steps A through E, and, together with zenesulfonamide products obtained thereby: Table I, infra, depict the intermediate derivatives and N- TABLEI x X X X is 4 is 1% RI R2 k: 1 R2 in )(4 11-03111 n-C3H -CF H H H TABLE IContlnue'd Ex. No. R R R X X X X 51 -a -CHzCH=CHz Il-ClsHu 11-05311 '-C1 H H H 52 CHzCECH n-CrHa 11-C4H9 Cl H H H 53 n-CqHn n- C4110 "NO] -N a H H at oHioH2o entom- -01 -o1 H H 55 Cl n-C4Ha n-C4H9 --F p H E H H-CH2CHC12 n-cin, H'C4H9 '-c1 Cl H H The novel compounds of this invention are uricosuric agents which can be administered in a wide variety of therapeutic dosages in conventional vehicles as, for example, by oral administration in the form of a tablet or by intravenous injection. Also, the daily dosage of the products may be varied over a wide range as, for example, in the form of scored tablets containing 5, 1O, 25, 50, 100, 150, 250 and 500 milligrams of the active ingredient for the symptomatic adjustment of the dosage to the patient to be treated. These dosages are well below the toxic or lethal dose of the products which may be administered in a total daily dosage of from 100 mg. to 2000 mg.

A suitable unit dosage form of the products of this invention can be administered by mixing 50 milligrams of an N-acetyl-4-di-n-butylsulfamoyl-3-trifluorornethylbe-nzenesulfonamide or a suitable salt with 149 mg. of lactose and 1 mg. of magnesium stearate and placing the 200 mg. mixture into a No. 2 gelatin capsule. Similarly, by employing more of the active ingredient and less lactose, other dosage forms can be put up in No. 2. gelatin capsules and, should it be necessary to mix more than 200 mg. of ingredients together, larger capsules may be employed. Compressed tablets, pills, or other desired unit dosages can be prepared to incorporate the compounds of thisv EXAMPLE 57 Dry-filled capsules containing 50 mg. of active ingredient per capsule Per capsule, mg. N-acetyl-4-di-n-butylsulfamoyl 3 trifluoromethylbenzenesulfonamide 50 Lactose U.S.P. 149 Magnesium Stearate U.S.P l

Capsule (Size No. 2) 200 The N acetyl-4-di-n-butylsulfamoyl-3-trifluoromethylbenzenesulfonamide is reduced to a No. 60 powder and then lactose and magnesium stearate are passed through a No. 60 bolting cloth onto the powder and the combined ingredients admixed for 1 0 minutes and then filled into a No. 2 dry gelatin capsule.

Similar dry-filled capsules can be prepared by replacing the active ingredient of the above example by any of. the other novel compounds of this invention.

It will be apparent from the foregoing description that the N-acyl and N-organosulfouyl mono-substituted and di-substituted sulfamoylbenzenesulfonamide products (I) of this invention constitute a valuable class of compounds which have not been prepared heretofore. One skilled in the art will also appreciate that the processes disclosed in the above'examples are merely illustrative and are capable of a wide variation and modification without departing from the spirit of this invention.

We claim: t

1. A compound having the formula:

wherein R isllower alkyl containing from l-4 carbon atoms, cycloalkyl containing from 5-6 nuclear carbon atoms, cycloalkylmethyl wherein the cycloalkyl contains from 5-6 nuclear carbon atoms, allyl, Z-propynyl, halo lower alkyl containing 1'-2 carbon atoms, polyhalo lower alkyl containing 1-3 carbon atoms, phenyl, benzyl, di-nbutylsulfamoyl substituted phenyl or furyl; R is hydrogen, lower alkyl of l-4 carbon atoms or cycloalkyl of 5-6 nuclear carbon atoms and R is lower alkyl of l-6 carbon atoms of 'cycloalkyl of 5-6 nuclear carbon atoms; X is halo, methyl, nitro, trihalomethyl, cyano or carboxy or two X radicals on adjacent carbon atoms may be joined to form a hydrocarbylene chain containing from 3 to 4 carbon atoms between their points of attachment; Z is carbonyl or sulfonyl andm is an integer having a value of 0-4 andzthe non-toxic, pharmaceutically acceptable salts thereof.

2. A compound having the formula:

NSO SO NH Z R 5 2 2 3. A compound according to claim 2 wherein R is 7 lower alkyl containing from 1-4 carbon atoms; R and R are lower alkyl containing from 1-6 carbon atoms; X is halo; X is hydrogen and Z is carbonyl,

4. A compound according to claim 2 wherein R is lower alkyl containing from 1-4 carbon atoms; R and R are lower alkyl containing from 1-6 carbon atoms; X and X are hydrogen and Z is carbonyl.

5. A compound according to claim 2 wherein R is lower alkyl containing from 1-4 carbon atoms; R and R are lower alkyl containing from 1-6 carbon atoms; X is trihalomet hyl; X is hydrogen and Z is carbonyl.

6. A compound according to claim 2 wherein R is lower alkyl containing from 14 carbon atoms; R and R are lower alkyl containing from 1-6 carbon atoms; X is halo; X is hydrogen and Z is sulfonyl.

7. A compound according to claim 2 wherein R is Z-furyl; R and R are lower alkyl containing from 14 carbon atoms; X is halo, X is hydrogen and Z is carbonyl.

8. A compound according to claim 3 wherein R is methyl and R and R are n-butyl and X is chloro.

9. A compound according to claim 4 wherein R is methyl and R and R are n-butyl.

10. A compound according to claim 5 wherein R is methyl; R and R are n-butyl and X is trifluoromethyl.

References Cited UNITED STATES PATENTS 1/1965 Holland et al. 260-556 1/1971 Sturm et al 260-556 ALEX MAZEL, Primary Examiner B. DENTZ, Assistant Examiner US. Cl. X.R. 

